Both sphenopsids and lycopsids were important members of the Pennsylvanian forests.
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Q1: Coelacanths were thought to be extinct, but
Q2: Based on embryo studies, blood proteins, and
Q3: Amphibians likely evolved from the lobe-finned crossopterygians.
Q5: The evolution of seeds allowed plants independence
Q6: The development of seeds allowed plants to
Q7: Gymnosperms represent the earliest flowering plants.
Q8: Fish are the earliest vertebrates.
Q9: Terrestrial vascular plants probably evolved from green
Q10: All crossopterygians went extinct at the end
Q11: The Devonian period is also known as
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